高血圧ジャーナル: オープンアクセス

The Plasmalemmal Na/K-ATPase: An Amplifier for Reactive Oxygen Species?

Abstract

Kyle D Maxwell, Preeya T Shah and Joseph I Shapiro

Although the plasmalemmal sodium potassium adenosine triphosphatase (Na/K-ATPase) is one of the most studied proteins in Biology or Medicine, a signaling function believed to be independent of its pumping function has only been noted in the past 20 years. This signaling function appears to require the generation of reactive oxygen species (ROS) which, in turn requires the activation of Src and the transactivation of the epithelial growth factor receptor (EGFR). Recent data suggest that the Na/K-ATPase may also serve as a receptor for some ROS and in this manner, serve to amplify oxidant signaling. The mechanisms involved and the implications for Physiology and Medicine are discussed in this review.